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Table 4 Results of blood survey

From: Joint malaria surveys lead towards improved cross-border cooperation between Savannakhet province, Laos and Quang Tri province, Vietnam

Indicators Laos Vietnam P-value
n % n %
Total no. of population in the study villages 4,568   7,888   
No. of family members in the study households (target for blood survey) 2,435 53(a) 5,071 64(a)
No. of blood examinations 1,256 51.5(b) 1,803 35.5(b) 0.001
No. malaria positive by microscopy 63 5.0 33 1.8  
Malaria species      
 P. falciparum 30 47.6 18 54.5 0.47(c)
 P.vivax 32 50.8 14 42.4  
 Mix (P. falciparum + P.vivax) 1 1.6 1 3.0  
Infection by age group      
 < 5 years (n: Laos =194; Vietnam = 251) 12 6.2 5 2.0 0.022
 5 – 14 years (n: Laos = 349; Vietnam = 750) 33 9.5 12 1.6 <0.001
 ≥15 years (n: Laos = 713; Vietnam = 802) 18 2.5 16 2.0 0.487
Infection by gender      0.52
 Male (n: Laos = 577; Vietnam = 816) 30 47.6 18 54.5  
 Female (n: Laos = 679; Vietnam = 987) 33 52.4 15 45.5  
  1. a: Compared to the total population of the study villages.
  2. b: Compared to the total number of family members in the study households.
  3. c: Between countries, disregarding the mixed cases.